I have this quadratic equation:
-2x^2 + 5x + 7 = 0
With the help of you lot, I've solved 'x', like so:
x = -1
x = 7 / 2
Now, I need to find the *highest*point of the graph (in terms of the y-axis)... Do I need to use trial and error for this? Or can it be solved via algebra?